feat: implemented service/transport/main layers

internal/transport/rest/config.go

@@ -0,0 +1,23 @@
+package rest
+
+import (
+	"fmt"
+
+	env "github.com/caarlos0/env/v11"
+)
+
+type Config struct {
+	Port int `env:"PORT" envDefault:"8080"`
+}
+
+func NewConfig(servicePrefix string) (*Config, error) {
+	cfg := &Config{}
+
+	if err := env.ParseWithOptions(cfg, env.Options{
+		PrefixTagName: fmt.Sprintf("%s_REST_", servicePrefix),
+	}); err != nil {
+		return nil, err
+	}
+
+	return cfg, nil
+}